diff --git a/types/ghost-storage-base/ghost-storage-base-tests.ts b/types/ghost-storage-base/ghost-storage-base-tests.ts
index c7cec6c41a..dc368982dc 100644
--- a/types/ghost-storage-base/ghost-storage-base-tests.ts
+++ b/types/ghost-storage-base/ghost-storage-base-tests.ts
@@ -1,4 +1,4 @@
-import { StorageBase, Image, ReadOptions } from 'ghost-storage-base';
+import StorageBase, { Image, ReadOptions } from 'ghost-storage-base';
 import { Request, Response, NextFunction } from 'express';
 
 class MyCustomAdapter extends StorageBase {
diff --git a/types/ghost-storage-base/index.d.ts b/types/ghost-storage-base/index.d.ts
index d5f053cfe5..4f68a0fb68 100644
--- a/types/ghost-storage-base/index.d.ts
+++ b/types/ghost-storage-base/index.d.ts
@@ -2,30 +2,34 @@
 // Project: https://github.com/TryGhost/Ghost-Storage-Base
 // Definitions by: Demian <https://github.com/thde>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
-// TypeScript Version: 2.3
+// TypeScript Version: 2.7
 
 import { Handler } from 'express';
 
-export interface Image {
-    path: string;
-    name: string;
-    type: string;
+declare namespace StorageBase {
+    interface Image {
+        path: string;
+        name: string;
+        type: string;
+    }
+
+    interface ReadOptions {
+        path: string;
+    }
 }
 
-export interface ReadOptions {
-    path: string;
-}
-
-export abstract class StorageBase {
+declare abstract class StorageBase {
     constructor();
 
     abstract exists(fileName: string, targetDir?: string): Promise<boolean>;
-    abstract save(image: Image, targetDir?: string): Promise<string>;
+    abstract save(image: StorageBase.Image, targetDir?: string): Promise<string>;
     abstract serve(): Handler;
     abstract delete(fileName: string, targetDir?: string): Promise<boolean>;
-    abstract read(options?: ReadOptions): Promise<Buffer>;
+    abstract read(options?: StorageBase.ReadOptions): Promise<Buffer>;
 
     getTargetDir(baseDir?: string): string;
-    getUniqueFileName(image: Image, targetDir: string): string;
+    getUniqueFileName(image: StorageBase.Image, targetDir: string): string;
     getSanitizedFileName(fileName: string): string;
 }
+
+export = StorageBase;
diff --git a/types/ghost-storage-base/tsconfig.json b/types/ghost-storage-base/tsconfig.json
index c7591e2df1..e4aadd158f 100644
--- a/types/ghost-storage-base/tsconfig.json
+++ b/types/ghost-storage-base/tsconfig.json
@@ -9,6 +9,7 @@
         "strictFunctionTypes": true,
         "strictNullChecks": true,
         "baseUrl": "../",
+        "esModuleInterop": true,
         "typeRoots": [
             "../"
         ],